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  1. 01-08-2019 #7
    john swift's Avatar
    Lives in merseyside, United Kingdom.
    john swift
    Last Activity: 18-01-2021 Has been a member for 9-10 years. Has a total post count of 257. Received thanks 53 times, giving thanks to others 0 times.
    After a quick look at photos of the uc300eth motoin controller board and
    5lpt mother board board
    It does not look like all of the uc300eth outputs are buffered
    Click image for larger version.  Name: UC300ETH ETHERNET MOTION CONTROLLER.jpg  Views: 1103  Size: 111.5 KB  ID: 26109
    Click image for larger version.  Name: 5LPT-UC300 Motherboard.jpg  Views: 1073  Size: 32.2 KB  ID: 26110

    How are you connecting your stepper drivers to the 5lpt mother board board ?

    If for example your using a breakout board with 74245 octal buffers
    to connect the uc300eth to the stepper driver inputs
    the load on the uc300eth outputs will be reduced and have a measure of protection

    Reducing the load on the uc300eth will also help to reduce the heating of the linear 3.3V regulator
    Click image for larger version.  Name: LMS117-3.3V SMD Voltage Regulator.jpg  Views: 1100  Size: 16.7 KB  ID: 26111

    John
    Last edited by john swift; 01-08-2019 at 12:40 PM.
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